Much of this is probably due to the shortness of the submission, but I found it hard to get a feeling for the setting. Fishing, to me, suggests people with fishing rods. An apprentice suggests fantasy (because they aren't on a trawler), whereas the clock you mention doesn't realy fit in with the fantasy world.
I also thought the boy read as if he were older than nine.
On the upside, you made something as banal as fishing seem interesting and even somewhat exciting when the boy flounders (pun intended) through the river. The middle two POVs are a bit weaker, mostly because their connection to the first one isn't readily apparent (they concern themselves with a minor detail in the first POV, not with something prominent), but you end strongly with the fish, which was unexpected and strange, but could easily have gone on for a few more pages.
By the way, no need to resort to footnotes. The text was clear enough by itself, and wasn't nearly as weak and unclear as it would have had to be for a footnote to be necessary. Quite the opposite.
Now, enough with these writing prompts. Give me the first chapter of a novel about a claustrophobic fish living underground!
